Joint attachment and support for double-wall pipe



r I I 1,614,179 Jan. 11 1927- w, .1. BARNES JOINT ATTACHMENT AND SUPPORT FOR DOUBLE WALL PIPE Filed August 17 1925 ATTORNEY.

Patented Jan. 11, 1927.

Uhll'fED STATES WILLIAM BARNES, r earners. M HI JOINT ATTACHMENT ALTD SUPPORT FQR DOUBLE-WALL PIPE.

Appiicationfiled August 17, 1925. Serial No. 50,568.

My invention relates to a new and useful improvement in a oint attachment and support for double wall pipe used with hot air furnaces and adapted for passing through the walls of the building so as to conduct the hot air from the furnace to the register. The invention has for its object the provision of a novel means for attaching the various sections of the wall pipe together and supporting the same in their assembled operative position.

1t is an object of the present invention to provide on the wall pipe a strap struck therefrom in such a way as to pern'iit a detachable strap to be attached thereto so as to project therefrom in the proper direction to extend to the uprights or 2 X as to which the straps may be attached.

Another object of the invention is the pro vision of means for attaching these straps to the wall pipe at that portion which is reinforced by a double layer of material.

Another object of the invention is the provision in a wall pipe of means for securing the interlocking ends of adjacent sections to gether.

Other objects will appear hereinafter.

The invention consists of the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood from a reference to the accompanying drawings which form a part of this specification, and in which,

Fig. 1 is a side elevational view of the invention,

Fig. 2 is a sectional view illustrating the punched-out strips formed on the wall pipe,

Fig. 3 is a sectional view showing one of the attac ring straps projected around the strips,

Fig. of the Fig.

4 is a sectional view illustrating one end strips in operative position,

5 is a perspective view of a section of wall pipe prepared for use of the invention,

Fig. 6 is a sectional view, illustrating a modified form of the invention.

As shown in the drawings, the wall pipe is made up from a plurality of rectangular sections 9 having double walls 10 and 11, positioned between which and clamped over the upper edges of which is a U-shaped channel forming member 12, so that the section has for a portion of its length a double wall made up from the walls 10 and 10 and the walls 11 and 11. This U-shaped member is positioned at one end of the section and the opposite end is reduced in thickness, as at M, to permit its insertion into the channel of the U -shaped member 12. Punched out of the walls 11 and 11 are straps 15 and 16. These straps are formed by cutting the material which forms the walls 11 and 11, as shown in the drawings. It will be noted that the upper edge 17 of the straps extends beyond at one side the lower edges 18 of the straps, and that the lower edge extends beyond the upper edge at the opposite end. The purpose of this arrangement is such that when the supporting straps 19 are inserted in the'openings thus formed, they will be inclined at an angle to the longitudinal axis of the sections, as clearly appears in Fig. 1, so that they will project beyond the uprights 20 and 21, to permit fastening thereto. As shown in Fig. 1, the straps preferably project downwardly from the sections which they support. However, if it is desired to project the fastenings upwardly, the same may be done by folding the strap into the position shown in dotted lines in Fig. 1, the strap when folded projecting upwardly in the oppo i liI CPiQD at h 1 angle of inclination as when projected down- 8 wardly.

As shown in Fig. 2 and Fig. 3, the reduced portion 14; is also provided with a strap 22 which is struck therefrom and preferably sprungoutwardly as clearly seen in Fig. 2, so that the sections are in interlocking engagement. As shown in Fig. 3, the supporting strap 19 may be extended on the innor surface of the strap 22 and the supporting strap thus used for retaining the sections in assembled relation to each other. The end walls 23 are also provided with straps 24 around which one end of the supporting strap 19 may be projected, its upper end 25 being bent downwardly into the channel of the U-shaped member 12. The upper end of the supporting strap 19 is secured to the 2 X 1 or upright 20 by nails or otherwise, as desired.

In the modified form shown in Fig. 6, I have provided the straps 15 and 16 with slots 15 and 16, so that if it is desired to disengage the sections, ascrew-driver or other tool may be projected through these slots so as to force the strap 22 inwardly to permit re moval of the sections.

This arrangement of hanging the sections of the wall pipe is a simple and inexpensive one, highly ei'iicient for the purposes intended. The position of attachment is at that point which is strongest, the maximum number of layers of material being embraced by the supporting straps. The formation of the slits in the wall pipe assures the projection of the straps in the proper direction so that a distorting or twisting of the straps out of their ordinary form is eliminated.

The arrangement of locking the sections together is also desirable as a more durable structure is provided and the number of straps supporting each section may be reduced on fiCCOllIlo of the close connection of the various sections with each other.

iVhile I have illustrated and described the preferred form of construction, I do not wish to limit myself to the precise details of structure shown in the drawings, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination with a sectional wall pipe, each section having a double wall adjacent one end thereof, a strap for supporting said section, said strap being insertable through a pair of spaced slits in said section and foldable over the material separating said slits, said slits being of substantially equal length and terminating with their ends ofiset from each other for directing said supporting strap angularly longitudinally of said section.

2. In combination with a sectional wall pipe, each section having a double Wall adjacent one end thereof, a strap for supporting said section, said strap being insertable through a pair of spaced slits in said section and foldable over the material separating said slits, said slits being of substantially equal length and terminating with their ends oli'set from each other for directing said supporting strap angularly longitudinally of said section, said strap being foldable upon itself along the line of the lowermost slit and projecting upwardly angularly outwardly from said section.

3. In combination with a wall pipe section having a double wall adjacent one edge, a supporting strap projected through spaced slits formed in the double wall of said sec tion, and foldable upon the material separating said slits.

4t. A supporting means for a wall pipe section comprising a strap projected through slits formed in said section adjacent one edge and doubled'over on the material separating said slits, said slits terminating at their ends in offset relation for effecting an inclination of said strap relatively to the longitudinal length of said section, said strap being foldable upon itself along the lowermost of said slits and projecting at the same inclination upwardly from said slit, said slits being formed in said Section at a reinforced portion.

In testimony whereof, I have signed the foregoing specification.

lVILLIAM J. BARNES. 

